Jean-François Bryche

Jean-François Bryche
French National Centre for Scientific Research | CNRS · International Research Laboratory LN2 / Dpt Physics

PhD

About

40
Publications
5,334
Reads
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428
Citations
Introduction
Working in the fields of photonics/plasmonics. Do not hesitate to contact me if you would like to intiate collaborations.
Additional affiliations
September 2017 - present
Université de Sherbrooke
Position
  • PostDoc Position
January 2017 - July 2017
Université Paris-Saclay
Position
  • PostDoc Position
October 2013 - December 2016
Institut d'Optique Graduate School
Position
  • PhD Student

Publications

Publications (40)
Article
Full-text available
In this paper, we report on an improved enhancement of the surface-enhanced Raman scattering (SERS) effect. Such improvement is obtained by using a continuous gold film (underlayer), which is added below an array of gold nanostructures. Two types of nanostructures were studied to validate our results: regular disk arrays with two diameters (110 and...
Article
We present a novel strategy to create an original nanostructured SPR biosensor with enhanced sensitivity. Our approach consists in using high refractive index dielectric materials to increase the sensitivity factor of a gold thin film despite its large evanescent electromagnetic field decay lengths. Iron oxide nanoparticles were grafted onto a gold...
Article
Recently, nanopillars have been shown to mechanically damage bacteria, suggesting a promising strategy for future antibacterial surfaces. However, the mechanisms underlying this phenomena remain unclear, which ultimately limits translational potential towards real-world applications. Using real-time and end-point analysis techniques, we demonstrate...
Article
Full-text available
In this work, a pump-probe experiment is used to study the ultrafast dynamics of heat transfer in thin gold films and gold nanostructures on glass substrates, following local heating by ultrashort laser pulses. Full spectrotemporal differential reflectivity and transmission maps were obtained for different film thicknesses (30, 50, 80, 150, and 200...
Article
We report on the performance and inherent artifacts of k-space optical microscopy for the study of periodic arrays of nanoparticles under the various illumination configurations available on an inverted optical microscope. We focus on the origin of these artifacts and the ways to overcome or even benefit from them. In particular, a recently reporte...
Article
We present a finite element (FE) based model to accurately investigate the dispersion and attenuation of Love waves in a multilayered structure made of a piezoelectric substrate, a guiding layer, and a viscous fluid. The numerical model solves the general form of the wave equations that includes the materials anisotropy, piezoelectricity, and visco...
Article
Surface plasmon resonance (SPR) biosensors based on metal thin films are very attractive for detection of biomolecules. Nanoparticle assemblies were recently demonstrated to significantly enhance sensitivity. Here, we show that the fine control of the structure of nanoparticle assemblies is critical to optimize the sensitivity. Iron oxide (Fe3-δO4)...
Preprint
Full-text available
Nanopillars are known to mechanically damage bacteria, suggesting a promising strategy for highly-effective anti-bacterial surfaces. However, the mechanisms underlying this phenomena remain unclear, which ultimately limits translational potential towards real-world applications. Using real-time and end-point analysis techniques, we demonstrate that...
Article
Full-text available
A new single-image acquisition technique for the determination of the dispersion relation of the propagating modes of a plasmonic multilayer stack is introduced. This technique is based on an electrically-driven, spectrally broad excitation source which is nanoscale in size: the inelastic electron tunnel current between the tip of a scanning tunnel...
Article
Full-text available
Surface plasmon resonance imaging (SPRI) is a powerful label-free imaging modality for the analysis of morphological dynamics in cell monolayers. However, classical plasmonic imaging systems have relatively poor spatial resolution along one axis due to the plasmon mode attenuation distance (tens of μm, typically), which significantly limits their a...
Article
Full-text available
This paper compares plasmonic substrates manufactured by three lithography methods: E-beam, soft and hard UV NanoImprint Lithography. The different plasmonic modes existing in samples made of an array of gold nanostructures on gold film are investigated for biochemical detections taking advantage of Surface Plasmon Resonance Imaging (SPRI) and Surf...
Article
Full-text available
This paper presents a new alternative fabrication of biochemical sensor based on surface enhanced Raman scattering (SERS) by soft nanoimprint lithography (S-NIL) on SiO2 sol-gel. Stabilization of the sol-gel film is obtained by annealing which simplifies the manufacturing of these biosensors and is compatible with mass production at low cost. This...
Article
In this paper, we report on the low-cost and quick fabrication at the 4-in. wafer-scale of hybrid nanoskittles for a highly sensitive detection of chemical molecules. This quick and low-cost fabrication is achieved by using the native oxide layer as a physical etch mask coupled to an evaporation of a gold layer. The hybrid nanoskittles obtained wit...
Thesis
Ce travail porte sur la réalisation de nanostructures d'or sur substrat de verre afin d’en étudier les propriétés plasmoniques et de les optimiser pour des applications dans le domaine des biocapteurs. L'objectif principal a été de démontrer la faisabilité de combiner sur une même biopuce, les biocapteurs à résonance de plasmon de surface propagati...
Article
Full-text available
Directional plasmon excitation and surface enhanced Raman scattering (SERS) emission were demonstrated for 1D and 2D gold nanostructure arrays deposited on a flat gold layer. The extinction spectrum of both arrays exhibits intense resonance bands that are redshifted when the incident angle is increased. Systematic extinction analysis of different g...
Article
Full-text available
Metal nanoparticle arrays have proved useful for different applications due to their ability to enhance electromagnetic fields within a few tens of nanometers. This field enhancement results from the excitation of various plasmonic modes at certain resonance frequencies. In this article, we have studied an array of metallic nanocylinders placed on...
Article
Surface-enhanced Raman scattering (SERS) is a sensitive and widely used as spectroscopic technique for chemical and biological structure analysis. One of the keys to increase the sensitivity of SERS sensors is to use nanoparticles/nanostructures. Here, we report on the density effect of gold nanodisks on SERS intensity for a highly sensitive detect...
Article
Full-text available
Metal nanoparticles have the ability to strongly enhance the local electromagnetic field in their vicinity. Such enhancement is crucial for biomolecular detection and is used by techniques such as surface plasmon resonance detection or surface enhanced Raman scattering. For these processes, the sensitivity strongly depends on the electromagnetic fi...
Article
Full-text available
The optical transmission and reflection in between two metalized optical fiber tips is studied in the optical near-field and far-field domains. In addition to aluminum-coated tips for near-field scanning optical microscopy (NSOM), specifically developed gold-coated fiber tips cut by focused ion beam are investigated. Transverse transmission maps of...
Article
In the Caliciviridae family of nonenveloped, positive-stranded RNA viruses, Noroviruses are major causes of human and animal gastroenteritis worldwide. The Norovirus T=3 icosahedral capsid is made of 180 copies of the VP1 protein, as exemplified in the crystal structure of the virus-like particle (VLP) of the human Norwalk virus (NV). It was previo...
Article
The self-assembly kinetics for a norovirus capsid protein were probed by time-resolved small-angle X-ray scattering and then analyzed by singular value decomposition and global fitting. Only three species contribute to the total scattering intensities: dimers, intermediates comprising some 11 dimers, and icosahedral T = 3 capsids made up of 90 dime...

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Projects

Projects (2)
Project
This project aims at the realization of an electrically driven nanosource of light with enhanced emission performance (efficiency, coherence, photon statistics) compared to the state of the art. https://cordis.europa.eu/project/id/101027372